The processing of Mg–Ti for hydrogen storage; mechanical milling and plasma synthesis

Çakmak, Gülhan; Károly, Zoltán; Mohai, Ilona; Őztürk, Tayfur; Szépvölgyi, János

doi:10.1016/j.ijhydene.2010.08.013

Cited by 27 publications

(7 citation statements)

References 16 publications

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“…Çakmak et al showed that mechanical milling of Mg with 10% Ti yields large Mg agglomerates up to 100 μm in size, with embedded Ti fragments of micron and submicron size distributed within the agglomerates . The Mg agglomerates are made of coherently diffracting crystallites, which can be as small as 26 nm after 30 h of milling.…”

Section: Synthetic Routesmentioning

confidence: 99%

“…Çakmak et al showed that mechanical milling of Mg with 10% Ti yields large Mg agglomerates up to 100 μm in size, with embedded Ti fragments of micron and submicron size distributed within the agglomerates. 184 The Mg agglomerates NPs as small as 7 nm in size embedded in a LiCl matrix. In comparison to bulk MgH 2 , the mechanochemically produced MgH 2 with the smallest particle size showed a 2.8 kJ mol −1 H 2 decrease in the decomposition reaction enthalpy.…”

Section: Ball Millingmentioning

confidence: 99%

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Nanostructured Metal Hydrides for Hydrogen Storage

et al. 2018

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Knowledge and foundational understanding of phenomena associated with the behavior of materials at the nanoscale is one of the key scientific challenges toward a sustainable energy future. Size reduction from bulk to the nanoscale leads to a variety of exciting and anomalous phenomena due to enhanced surface-to-volume ratio, reduced transport length, and tunable nanointerfaces. Nanostructured metal hydrides are an important class of materials with significant potential for energy storage applications. Hydrogen storage in nanoscale metal hydrides has been recognized as a potentially transformative technology, and the field is now growing steadily due to the ability to tune the material properties more independently and drastically compared to those of their bulk counterparts. The numerous advantages of nanostructured metal hydrides compared to bulk include improved reversibility, altered heats of hydrogen absorption/desorption, nanointerfacial reaction pathways with faster rates, and new surface states capable of activating chemical bonds. This review aims to summarize the progress to date in the area of nanostructured metal hydrides and intends to understand and explain the underpinnings of the innovative concepts and strategies developed over the past decade to tune the thermodynamics and kinetics of hydrogen storage reactions. These recent achievements have the potential to propel further the prospects of tuning the hydride properties at nanoscale, with several promising directions and strategies that could lead to the next generation of solid-state materials for hydrogen storage applications.

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Section: Synthetic Routesmentioning

confidence: 99%

“…Çakmak et al showed that mechanical milling of Mg with 10% Ti yields large Mg agglomerates up to 100 μm in size, with embedded Ti fragments of micron and submicron size distributed within the agglomerates. 184 The Mg agglomerates NPs as small as 7 nm in size embedded in a LiCl matrix. In comparison to bulk MgH 2 , the mechanochemically produced MgH 2 with the smallest particle size showed a 2.8 kJ mol −1 H 2 decrease in the decomposition reaction enthalpy.…”

Section: Ball Millingmentioning

confidence: 99%

Nanostructured Metal Hydrides for Hydrogen Storage

et al. 2018

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“…Recently, Çakmak et al showed that mechanical milling of Mg-10 vol.% Ti yields large Mg agglomerate, 90-100 μm, with embedded Ti fragments of about 1 μm uniformly distributed within the agglomerates [67]. These Mg agglomerates are made of coherently diffracting volumes of small size (crystallites).…”

Section: Mg-based Bccmentioning

confidence: 99%

Nanocrystalline Metal Hydrides Obtained by Severe Plastic Deformations

Huot

2012

Metals

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It has recently been shown that Severe Plastic Deformation (SPD) techniques could be used to obtain nanostructured metal hydrides with enhanced hydrogen sorption properties. In this paper we review the different SPD techniques used on metal hydrides and present some specific cases of the effect of cold rolling on the hydrogen storage properties and crystal structure of various types of metal hydrides such as magnesium-based alloys and body centered cubic (BCC) alloys. Results show that generally cold rolling is as effective as ball milling to enhance hydrogen sorption kinetics. However, for some alloys such as TiV 0.9 Mn 1.1 alloy ball milling and cold rolling have detrimental effect on hydrogen capacity. The exact mechanism responsible for the change in hydrogenation properties may not be the same for ball milling and cold rolling. Nevertheless, particle size reduction and texture seems to play a leading role in the hydrogen sorption enhancement of cold rolled metal hydrides.

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“…Mediante Análisis Calorimétrico Diferencial (DSC) identificaron transformaciones exotérmicas de carácter difusivo en torno a 400 ºC y energía de activación de 200 kJ/mol. Çakmak et al [9], realizaron la síntesis de la aleación Mg10Ti, para el almacenamiento de hidrógeno mediante dos rutas: AM y síntesis de plasma por radiofrecuencia (RF), obteniendo estructuras compuestas de aglomerados grandes de Mg con partículas de Ti embebidas uniformemente. Y polvos de Mg extremadamente finos con partículas de Ti separadas del nanopolvo de Mg.…”

Section: Introductionunclassified

SÍNTESIS Y CARACTERIZACIÓN DE ALEADOS DE Mg 20% Y 40% MASA DE Ti PREPARADOS POR ALEACIÓN MECÁNICA

Malave

Agreda²

2022

rev. colom. mater.

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Aleados de Mg conteniendo 20% y 40% masa de Ti (Mg20Ti) (Mg40Ti), han sido sintetizados por aleación mecánica y caracterizados mediante difracción de rayos-X (DRX) y microscopia electrónica de barrido (MEB con EDS) Los estudios DRX sugieren la incorporación de Ti en la fase Mg, y luego de 40 horas de molienda se aprecia la aparición de dos reflexiones identificadas como óxidos de Mg-Ti. El oxígeno se incorpora al proceso de síntesis debido a las continuas fracturas y soldaduras que ocurren durante la molienda, y hace posible también la formación de una solución sólida de Ti, TiMg. A medida que el tiempo de molienda se incrementa, la talla de cristalitas (D y DS) muestra un decrecimiento hasta valores cercanos a 10 nm, corroborándose este comportamiento mediante microscopía, donde la disminución de talla de partículas alcanza aproximadamente 20 nm. La morfología del aleado va variando, hasta observarse de forma globular o conglomerados de partículas. El análisis EDS confirmó además de Ti y Mg, la presencia de otros elementos.

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The processing of Mg–Ti for hydrogen storage; mechanical milling and plasma synthesis

Cited by 27 publications

References 16 publications

Nanostructured Metal Hydrides for Hydrogen Storage

Nanostructured Metal Hydrides for Hydrogen Storage

Nanocrystalline Metal Hydrides Obtained by Severe Plastic Deformations

SÍNTESIS Y CARACTERIZACIÓN DE ALEADOS DE Mg 20% Y 40% MASA DE Ti PREPARADOS POR ALEACIÓN MECÁNICA

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